重构-线性进度条

落日映苍穹つ 2021-07-25 01:42 375阅读 0赞

动画:
    	传递颜色数组后,颜色过渡
    	宽度改变有0.6s过渡
    
    参数:
      percentage: PropTypes.number,		进度数值,0-100
      onSuccess: PropTypes.func,		当加载到100%时,触发回调,第一个参数是状态
      colors: PropTypes.array,			颜色数组,会根据传递的颜色,在不同进度现实不同颜色,默认为蓝色		
      suffix: PropTypes.bool,			后置图标,在整个轨道后出现,未实现逻辑,仅是展现,需自定义设置
      show: PropTypes.bool,			    是否在进度条尾部现实数字
      width: PropTypes.string,			进度条长度
      height: PropTypes.string,			进度条高度
      borderRadius: PropTypes.string,   进度条圆角
      fontSize: PropTypes.string,		数字和图标字体大小
      outerColor: PropTypes.string,	    轨道颜色
      innerColor: PropTypes.string,     进度颜色
      percentColor: PropTypes.string,	数字颜色

效果图:  
![在这里插入图片描述][20201207175033798.png]  
![在这里插入图片描述][20201207175049242.png]  
代码示例:  
使用:

import React,{ useState,useRef,useEffect,useCallback} from 'react'
    import Progress from './progress/progress'
    
    function App(){ 
      let [value,setValue] =useState(0);
      const valf = useRef(null);
      valf.current = value;
    
    
      const _onClick = function ()
      { 
          setInterval(() => { 
        
                setValue(v=>v+1);      
          },1000)
    
      }
    
      
      
      
      const _onSuccess = function (state)
      { 
        console.log(state);
      }
    
    
      return(
    
        <div>
          <Progress colors={ ['#aaa', 'brown', 'blue', 'green']} percentage={ value} onSuccess={ _onSuccess} show ></Progress>
          <br />
          <br/>
          <button onClick={ _onClick}>开始</button>
    
        </div>
      )
    }
    
    export default App

progress.jsx:

import React,{ useState,useEffect,useCallback,useRef,useMemo} from 'react'
    import PropTypes from 'prop-types'
    import './progress.css'
    
    function App(props){ 
    
      const progressf = useRef(null);
      const innerf = useRef(null);
    
      // 初始样式设置
      useEffect(() => { 
        _styleHandler('width', props.width);
        _styleHandler('height', props.height);
        _styleHandler('borderRadius', props.borderRadius);
        _styleHandler('fontSize', props.fontSize);
        _styleHandler('outerColor', props.outerColor);
        _styleHandler('innerColor', props.innerColor);
        _styleHandler('percentColor', props.percentColor);
      },[])
    
      // 进度改变过程设置
      useEffect(() => { 
        innerf.current.style.width = _percentHandler + '%';
    
        props.percentage === 100 && props.onSuccess(true);
        props.suffix && _situationHandler();
        
        if(props.colors.length)
        { 
          let index = Math.floor(100 / props.colors.length);
          _percentColorHandler(_percentHandler, index);
        }
    
      },[props.percentage])
    
      //统一处理初始化样式
      const _styleHandler = useCallback((key, value) => { 
        props[key] && progressf.current.style.setProperty('--' + key, value)
        
      },[])
    
      //计算属性返回当前数值
      const _percentHandler =useMemo(function ()
      { 
        return Math.floor(Math.max(0,Math.min(100,props.percentage)))
      },[props.percentage])
    
      //如果传入数组的颜色变化
      const _percentColorHandler =useCallback(function(num,index)
      { 
        
        let _index = Math.floor(num / index);
        (_index == props.colors.length) &&( _index = props.colors.length - 1);
        
        innerf.current.style.backgroundColor=props.colors[_index]
      },[])
    
    
      //当有后置图标时,根据进度清空,对图标的处理函数
      const _situationHandler = useCallback(() => { 
        // console.log(_percentHandler);
    
      },[_percentHandler])
    
      return(
    
        <div className='jf-progress-container' ref={ progressf}>
          <div className='jf-progress-outer'>
            <div className='jf-progress-inner' ref={ innerf}>{ props.show && <div className='jf-progress-num'>{ _percentHandler}%</div>}</div>
          </div>
          { props.suffix && <span className='jf-progress-suffix'>√</span>}
        </div>
      )
    }
    
    App.propTypes = { 
      percentage: PropTypes.number,
      onSuccess: PropTypes.func,
      colors: PropTypes.array,
      suffix: PropTypes.bool,
      show: PropTypes.bool,
      width: PropTypes.string,
      height: PropTypes.string,
      borderRadius: PropTypes.string,
      fontSize: PropTypes.string,
      outerColor: PropTypes.string,
      innerColor: PropTypes.string,
      percentColor: PropTypes.string,
    }
    
    App.defaultProps = { 
      percentage: 0,
      onSuccess: () => {  },
      colors:[]
    }
    
    export default React.memo(App);

progress.css:

.jf-progress-container { 
      display: inline-block;
      box-sizing: border-box;
      width: var(--width);
      height: var(--height);
      position: relative;
      vertical-align: middle;
    
      --width: 400px;
      --height: 20px;
      --borderRadius: 20px;
      --outerColor: #ebeef5;
      --innerColor: #409eff;
      --innerWidth: px;
      --percentColor: white;
      --fontSize: 12px;
    }
    
    .jf-progress-outer { 
      width: 100%;
      height: 100%;
      position: relative;
      background-color: var(--outerColor);
      border-radius: var(--borderRadius);
      overflow: hidden;
      vertical-align: middle;
      /* display: flex; */
    }
    
    .jf-progress-inner { 
      position: absolute;
      left: 0;
      top: 0;
      height: 100%;
      background-color: var(--innerColor);
      border-radius: var(--borderRadius);
      text-align: right;
    
      line-height: var(--height);
      font-size: 0;
      transition: width 0.6s ease, background-color 1s;
    }
    
    .jf-progress-num { 
      display: inline-block;
      vertical-align: middle;
      font-size: var(--fontSize);
      color: var(--percentColor);
    }
    .jf-progress-suffix { 
      position: absolute;
      top: 0;
      right: 0;
      font-size: var(--fontSize);
      line-height: var(--height);
      transform: translateX(120%);
    }

[20201207175033798.png]: /images/20210724/dd689ef699a541fea1082ed05ed540ce.png
[20201207175049242.png]: /images/20210724/d90382d5537e468eaa48ea42f88dae8a.png